From 505fa84a0c33ac8f869847bfafd661e4b669836d Mon Sep 17 00:00:00 2001
From: azv <azv@opencascade.com>
Date: Tue, 20 Aug 2019 16:11:00 +0300
Subject: [PATCH] Issue #2980: Crash when change sketch plane

Avoid crash on Horizontal/Vertical constraint presentation while changing the sketch plane.
---
 src/SketcherPrs/SketcherPrs_HVDirection.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/SketcherPrs/SketcherPrs_HVDirection.cpp b/src/SketcherPrs/SketcherPrs_HVDirection.cpp
index 942bd909e..336f298b2 100644
--- a/src/SketcherPrs/SketcherPrs_HVDirection.cpp
+++ b/src/SketcherPrs/SketcherPrs_HVDirection.cpp
@@ -39,13 +39,14 @@ SketcherPrs_HVDirection::SketcherPrs_HVDirection(ModelAPI_Feature* theConstraint
 }
 
 bool SketcherPrs_HVDirection::IsReadyToDisplay(ModelAPI_Feature* theConstraint,
-                                               const std::shared_ptr<GeomAPI_Ax3>&/* thePlane*/)
+                                               const std::shared_ptr<GeomAPI_Ax3>& thePlane)
 {
   bool aReadyToDisplay = false;
-  ObjectPtr aObj =
-    SketcherPrs_Tools::getResult(theConstraint, SketchPlugin_Constraint::ENTITY_A());
-
-  aReadyToDisplay = SketcherPrs_Tools::getShape(aObj).get() != NULL;
+  if (thePlane.get()) {
+    ObjectPtr aObj =
+        SketcherPrs_Tools::getResult(theConstraint, SketchPlugin_Constraint::ENTITY_A());
+    aReadyToDisplay = SketcherPrs_Tools::getShape(aObj).get() != NULL;
+  }
   return aReadyToDisplay;
 }
 
-- 
2.39.2